package com.etcsoft.examples.yjstory;

import java.io.File;

import org.eclipse.swt.SWT;
import org.eclipse.swt.awt.SWT_AWT;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Sash;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class FileTreeSystemSample {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);

        RGB color = shell.getBackground().getRGB();
        
        Label separator1 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
        Label locationLb = new Label(shell, SWT.NONE);
        locationLb.setText("Location:");
        Composite locationComp = new Composite(shell, SWT.EMBEDDED);
        Label separator2 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
        final Composite comp = new Composite(shell, SWT.NONE);
        final Tree fileTree = new Tree(comp, SWT.SINGLE | SWT.BORDER);
        Sash sash = new Sash(comp, SWT.VERTICAL);
        Composite tableComp = new Composite(comp, SWT.EMBEDDED);
        Label separator3 = new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
        Composite statusComp = new Composite(shell, SWT.EMBEDDED);

        java.awt.Frame locationFrame = SWT_AWT.new_Frame(locationComp);
        final java.awt.TextField locationText = new java.awt.TextField();
        locationFrame.add(locationText);

        java.awt.Frame statusFrame = SWT_AWT.new_Frame(statusComp);
        statusFrame.setBackground(new java.awt.Color(color.red, color.green, color.blue));
        final java.awt.Label statusLabel = new java.awt.Label();
        statusFrame.add(statusLabel);
        statusLabel.setText("Select a file");

        sash.addListener(SWT.Selection, new Listener() {
            public void handleEvent(Event e) {
                if (e.detail == SWT.DRAG)
                    return;
                GridData data = (GridData) fileTree.getLayoutData();
                Rectangle trim = fileTree.computeTrim(0, 0, 0, 0);
                data.widthHint = e.x - trim.width;
                comp.layout();
            }
        });

        File[] roots = File.listRoots();
        
        for (int i = 0; i < roots.length; i++) {
            File file = roots[i];
            TreeItem treeItem = new TreeItem(fileTree, SWT.NONE);
            treeItem.setText(file.getAbsolutePath());
            treeItem.setData(file);
            new TreeItem(treeItem, SWT.NONE);
        }
        fileTree.addListener(SWT.Expand, new Listener() {
            public void handleEvent(Event e) {
                TreeItem item = (TreeItem) e.item;
                if (item == null)
                    return;
                if (item.getItemCount() == 1) {
                    TreeItem firstItem = item.getItems()[0];
                    if (firstItem.getData() != null)
                        return;
                    firstItem.dispose();
                } else {
                    return;
                }
                File root = (File) item.getData();
                File[] files = root.listFiles();
                if (files == null)
                    return;
                for (int i = 0; i < files.length; i++) {
                    File file = files[i];
                    if (file.isDirectory()) {
                        TreeItem treeItem = new TreeItem(item, SWT.NONE);
                        treeItem.setText(file.getName());
                        treeItem.setData(file);
                        new TreeItem(treeItem, SWT.NONE);
                    }
                }
            }
        });
        
        fileTree.addListener(SWT.Selection, new Listener() {
            public void handleEvent(Event e) {
                TreeItem item = (TreeItem) e.item;
                if (item == null)
                    return;
                final File root = (File) item.getData();
                statusLabel.setText(root.getAbsolutePath());
                locationText.setText(root.getAbsolutePath());
            }
        });

        GridLayout layout = new GridLayout(4, false);
        layout.marginWidth = layout.marginHeight = 0;
        layout.horizontalSpacing = layout.verticalSpacing = 1;
        shell.setLayout(layout);
        
        GridData data;
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 4;
        separator1.setLayoutData(data);
        
        data = new GridData();
        data.horizontalSpan = 1;
        data.horizontalIndent = 10;
        locationLb.setLayoutData(data);
        
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 2;
        data.heightHint = locationText.getPreferredSize().height;
        locationComp.setLayoutData(data);
        
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 1;
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 4;
        separator2.setLayoutData(data);
        
        data = new GridData(GridData.FILL_BOTH);
        data.horizontalSpan = 4;
        comp.setLayoutData(data);
        
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 4;
        separator3.setLayoutData(data);
        
        data = new GridData(GridData.FILL_HORIZONTAL);
        data.horizontalSpan = 4;
        data.heightHint = statusLabel.getPreferredSize().height;
        statusComp.setLayoutData(data);

        layout = new GridLayout(3, false);
        layout.marginWidth = layout.marginHeight = 0;
        layout.horizontalSpacing = layout.verticalSpacing = 1;
        
        comp.setLayout(layout);
        
        data = new GridData(GridData.FILL_VERTICAL);
        data.widthHint = 200;
        fileTree.setLayoutData(data);
        
        data = new GridData(GridData.FILL_VERTICAL);
        sash.setLayoutData(data);
        data = new GridData(GridData.FILL_BOTH);
        tableComp.setLayoutData(data);

        shell.open();
        
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}